Dual-Line Spectral Imaging of the Chromosphere
Abstract
Hα filtergrams are notoriously difficult to interpret, "beautiful to view but not fit for analysis." We try to remedy this by using the IBIS bi-dimensional spectrometer at the Dunn Solar Telescope at NSO/Sacramento Peak to compare the quiet-sun chromosphere observed in Hα to what is observed simultaneously in Ca II 854.2 nm, sampling both lines with high angular and spectral resolution and extended coverage of space, time, and wavelength. Per (x, y, t) pixel we measured the intensity and Dopplershift of the minimum of each line's profile at that pixel, as well as the width of their inner chromospheric cores. A paper submitted to A&A (December 2008) compares these measurements in detail.
- Publication:
-
Magnetic Coupling between the Interior and Atmosphere of the Sun
- Pub Date:
- 2010
- DOI:
- 10.1007/978-3-642-02859-5_75
- Bibcode:
- 2010ASSP...19..513C
- Keywords:
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- Physics